/*
 * Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 */
package qunar.tc.decompiler.struct.attr;

import qunar.tc.decompiler.struct.consts.ConstantPool;
import qunar.tc.decompiler.util.DataInputFullStream;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/*
  u1 parameters_count;
  {   u2 name_index;
      u2 access_flags;
  } parameters[parameters_count];
*/
public class StructMethodParametersAttribute extends StructGeneralAttribute {
    private List<Entry> myEntries;

    @Override
    public void initContent(DataInputFullStream data, ConstantPool pool) throws IOException {
        int len = data.readUnsignedByte();
        List<Entry> entries;
        if (len > 0) {
            entries = new ArrayList<>(len);

            for (int i = 0; i < len; i++) {
                int nameIndex = data.readUnsignedShort();
                String name = nameIndex != 0 ? pool.getPrimitiveConstant(nameIndex).getString() : null;
                int access_flags = data.readUnsignedShort();
                entries.add(new Entry(name, access_flags));
            }
        } else {
            entries = Collections.emptyList();
        }
        myEntries = Collections.unmodifiableList(entries);
    }

    public List<Entry> getEntries() {
        return myEntries;
    }

    public static class Entry {
        public final String myName;
        public final int myAccessFlags;

        public Entry(String name, int accessFlags) {
            myName = name;
            myAccessFlags = accessFlags;
        }
    }
}
